As you can see, this XML describes the level's contents. Here there's a couple of rectangles, a circle, a path, and a texture.

The file contains information for the game and the editor. For example, for the texture, theres an Editor element with attributes that describe what type of editor (ClrTypeOfEditor) for the Gleed 2D tool and what type of properties for the game (ClrTypeOfProperties)

In your game, you can load the XML with the LevelLoader type. You then get a hierarchy of things deriving from ItemProperties which you can transform to your in-game objects. You also have the choice to parse the XML directly.